I searched a lot but could not find a single documentation on requirements/specs/process for registering as a network with any of the ad mediator liked AdMob etc.
I already know that I would have to create a SDK and a adapter that would communicate with Ad-Mob's SDK but I can't seem to locate any document regarding API standards.
I would contact the Google Devs on the Admob forum https://groups.google.com/forum/#!forum/google-admob-ads-sdk